Hager SPA911 Surge Protective Device Type T1+T2 MOV 2P for TN-S/TT Networks

The Hager SPA911 is a high-performance combined Type T1+T2 surge protective device engineered to provide robust electrical safety in TN-S and TT network configurations. By utilizing advanced metal oxide varistor (MOV) technology, this 2-pole device effectively mitigates the risks associated with atmospheric lightning strikes and transient switching overvoltages. It serves as a critical safety component for modern residential and commercial distribution boards, ensuring that sensitive electronic equipment remains protected from sudden power surges while maintaining overall system integrity and operational reliability.

Advantages

This surge protective device offers a comprehensive solution by combining the capabilities of both Type 1 and Type 2 protection in a single compact unit. Its MOV-based architecture ensures a fast response time to voltage spikes, effectively clamping excess energy before it can damage connected hardware. The 2-pole design is specifically optimized for integration into common electrical distribution systems, providing a seamless installation process for electricians and facility managers. By installing this device, users significantly reduce the risk of equipment failure, data loss, and fire hazards caused by electrical disturbances.

Suitable for

• Residential electrical distribution boards
• Commercial office building power systems
• Protection of sensitive electronic appliances
• TN-S and TT network infrastructure

When it may not be suitable

This device is not intended for use in IT network configurations or systems operating outside the specified voltage parameters. It should not be installed in environments where the expected surge current exceeds the device's rated capacity, as this may lead to premature failure or inadequate protection.

Key specifications

• Device Type: Combined T1+T2
• Technology: Metal Oxide Varistor (MOV)
• Number of poles: 2
• Network compatibility: TN-S and TT

How to use

The Hager SPA911 should be installed by a qualified electrician within the main distribution board. It is typically mounted on a standard DIN rail at the point of entry for the electrical supply. Ensure that the wiring connections are tightened to the manufacturer's specified torque settings to prevent overheating. The device should be connected in parallel with the electrical circuit, ensuring that the grounding connection is robust and follows local electrical safety regulations.

What to consider before purchase

• Verify that your electrical network is a TN-S or TT system
• Ensure there is sufficient space on the DIN rail in your distribution board
• Check that the voltage ratings match your local power supply
• Confirm that the device meets the specific safety requirements of your installation site

Usage recommendations

Regularly inspect the status indicator on the device to ensure it is functioning correctly. If the indicator shows that the protection module has reached the end of its service life, replace the unit immediately to maintain continuous protection for your electrical system.